Crossword clues for the word: STILLUP The word STILLUP has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for STILLUP Showing 1 to 6 of 6 results Clue(s) "Suffering from insomnia, perhaps" Battling insomnia Burning the midnight oil Not asleep yet Not in bed yet Not yet sleeping